package demo3;
interface IA1{
    void funcIA1();
}
interface IB1 extends IA1{//拓展b的功能
    void funcIB1();
}
class H implements IB1{
    @Override
    public void funcIA1() {
        System.out.println("a");
    }

    @Override
    public void funcIB1() {
        System.out.println("b");
    }
}

public class Test3 {
}
